Bluetooth and hibernation

Several weeks ago I requested help with a hibernation problem. The computer does not readily restart after hibernation. It requires many power switch attempts. Later I discovered that I can prevent the problem by switching to airplane mode prior to hibernation. However, I never did receive a solution.

Now I have a Bluetooth problem. The computer can reconnect to devices that had been connected earlier. However, it cannot connect to my new Sony headphones. My phone connects very well to them.

The laptop does not detect any Bluetooth devices when I try to add a device.

I have had two premium support sessions that did not lead to any insights. This was the pattern with the hibernation problem. After many sessions, the idea was to rebuild the OS. However, that had already been done for a different problem. It took me hours to recover. I never did recover some files because I didn't know how to make a good backup.

I would like suggestions about ideas to try.